﻿/*    
    OpenMheg - A free MHEG-5 library
    Copyright (C) 2008 Dharmesh Malam

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
using System;
using System.Collections.Generic;
using System.Text;
using Core.Model.Data.Type;
using ASN1Decoder.Builders.Nodes;
using Core.Model;
using Core.Model.Data;
using Exceptions;
using Core.Model.Groups;

namespace ASN1Decoder.Builders
{
    internal class ContentRefBuilder
    {
        internal static ContentRef BuildContentRef(SequenceNode node, Group group)
        {
            ContentRef ret = new ContentRef();
            TaggedNode e;

            //if ((e = node[ASN1ContextCodes.C_CONTENT_REFERENCE]) != null)
                ret.Value= node.First.StringValue.ToString();
               // if (ret.Value == "" || ret.Value == " ") throw new OpenMhegException("ContentRef malformed");    

                if ((e = node[ASN1ContextCodes.C_CONTENT_SIZE]) != null)
                    ret.ContentSize = e.First.IntValue;

                if ((e = node[ASN1ContextCodes.C_CONTENT_CACHE_PRIORITY]) != null)
                    ret.ContentCachePriority = e.First.IntValue;
         
            return ret;

        }


        internal static Content BuildContent(TaggedNode node, Group group)
        {
            Content content;
            TaggedNode e;

            ASN1Node arg = node.First;

            if (arg is OctetStringNode)
            {
                if (arg.StringValue != null)
                    content = new Content( arg.StringValue);
                else throw new NullReferenceException("Should be a string");
                
                if ((e = node[ASN1ContextCodes.C_CONTENT_SIZE]) != null)
                    content.ContentSize = e.First.IntValue;

                if ((e = node[ASN1ContextCodes.C_CONTENT_CACHE_PRIORITY]) != null)
                    content.ContentCachePriority = e.First.IntValue;
            }
            else if (arg is SequenceNode)
            {
                ContentRef reference = BuildContentRef((SequenceNode)arg,group);
                content = new Content(reference);

                if (node.Size > 1) throw new OpenMhegException("Unexpected node");
 
            }
            else
                throw new OpenMhegException("Unexpected Node");

            return content;
      
        }


    }
}
